How to check in JavaScript if XMLHttpRequest object supports W3C Progress Events?

Question

Is there any way to check within JavaScript if XMLHttpRequest object supports W3C Progress Events? I mean here if setting onload, onprogress

Answer 1

Have you tried doing it this way?

try {
    var xhr = new XMLHttpRequest();

    if ('onprogress' in xhr) {
        // Browser supports W3C Progress Events
    } else {
        // Browser does not support W3C Progress Events
    }
} catch (e) {
    // Browser is IE6 or 7
}

I tested this in Firefox & IE8. Firefox shows it supports it. IE says it has no support for W3C Progress events.